[1] Ding Youliang, Li Aiqun, Miao Changqing,. Theoretical research on structural damage alarmingof long-span bridges using wavelet packet analysis [J]. Journal of Southeast University (English Edition), 2005, 21 (4): 459-462. [doi:10.3969/j.issn.1003-7985.2005.04.017]

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Theoretical research on structural damage alarmingof long-span bridges using wavelet packet analysis()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

21

Issue:

2005 4

Page:

459-462

Research Field:

Civil Engineering

Publishing date:

2005-12-30

Info

Title:

Theoretical research on structural damage alarmingof long-span bridges using wavelet packet analysis

Author(s):

Ding Youliang;  Li Aiqun;  Miao Changqing

College of Civil Engineering, Southeast University, Nanjing 210096, China

Keywords:

structural damage alarming;  wavelet packet analysis;  wavelet packet energy spectrum;  long-span bridge

PACS:

TU311.41

DOI:

10.3969/j.issn.1003-7985.2005.04.017

Abstract:

The state equation and observation equation of the structural dynamic systems under various analysis scales are derived based on wavelet packet analysis.The time-frequency properties of structural dynamic response under various scales are further formulated.The theoretical analysis results reveal that the wavelet packet energy spectrum(WPES)obtained from wavelet packet decomposition of structural dynamic response will detect the presence of structural damage.The sensitivity analysis of the WPES to structural damage and measurement noise is also performed.The transfer properties of the structural system matrix and the observation noise under various analysis scales are formulated, which verify the damage alarming reliability using the proposed WPES with preferable damage sensitivity and noise robusticity.

References:

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[4] Ding Y L, Li A Q, Han X L.Numerical research on real-time structural damage alarming based on wavelet packet analysis [J].Journal of Southeast University (Natural Science Edition), 2003, 33(5):643-646.(in Chinese)
[5] Yan Y J, Yam L H.Online detection of crack damage in composite plates using embedded piezoelectric actuators/sensors and wavelet analysis [J].Composite Structures, 2002, 58(1):29-38.
[6] He Y, Shen S, Ying H Q, et al.Application of wavelet packet decomposition and its energy spectrum on the fault diagnosis of reciprocation machinery [J].Journal of Vibration Engineering, 2001, 14(1):72-75.(in Chinese)
[7] Sun Z, Chang C C.Structural damage assessment based on wavelet packet transform [J].Journal of Structural Engineering, 2002, 128(10):1354-1361.
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Memo

Memo:

Biographies: Ding Yonliang(1979—), male, graduate;Li Aiqun(corresponding author), male, doctor, professor, aiqunli@public1.ptt.js.cn.

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